阅读本刊1997年第9期刊登的《混凝土成孔预制件》一文,对所提出的在住宅楼厨房和卫生间钢筋混凝土楼板预留洞的施工时采用混凝土成孔预制件的施工方法表示赞同,但就其预制件的制作和施工方法提几点建议。1.现浇钢筋混凝土板是楼盖中的大面积构件,从节约混凝土角度考虑其厚度应尽量薄一些,但应满足一般楼面厚度≥60 Read the article “Concrete pore forming prefabricated parts” published in the 9th issue of this publication in 1997, and endorsed the proposed method of using concrete pore-forming prefabricated parts in the construction of reserved holes in residential buildings kitchen and toilet reinforced concrete floors. However, several suggestions were made on the production and construction methods of its preforms. 1. Cast-in-situ reinforced concrete slab is a large-area component in the floor cover. From the perspective of saving concrete, the thickness should be as thin as possible, but it should meet the general floor thickness ≥60